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High-resolution vibroacoustic characterization of DLR´s Falcon 2000LX ISTAR aircraft

Winter, Rene and Sinske, Julian and Norambuena, Marco and Zettel, Sebastian Florens (2023) High-resolution vibroacoustic characterization of DLR´s Falcon 2000LX ISTAR aircraft. CEAS Aeronautical Journal. Springer. doi: 10.1007/s13272-023-00676-9. ISSN 1869-5590.

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Official URL: https://link.springer.com/article/10.1007/s13272-023-00676-9


In the framework of CleanSky2’s Airframe project DA9, engine tonal noise is a cooperation between Dassault Aviation and DLR. The project aims to enhance the understanding and mitigation of engine-related tonal noise in the aircraft cabin. The presented work was done to get an in-depth understanding of the vibroacoustic behavior of DLR’s Falcon 2000LX ISTAR aircraft. A two and a half weeks long vibroacoustic ground test was conducted utilizing artificial shaker excitation and operational engine excitation. The responses were measured using a roving grid of accelerometers at more than 1200 positions, meaning a subset of about 250 sensors were installed at every given time and then moved along the fuselage in a predetermined way to get a high-resolution measurement of aircrafts fuselage. The accelerometer data were than processed to show operational deflections shapes and calculate experimental structural intensity vector fields to analyze the energy transfer through the structure for optimized placement of active or passive counter measures. Specifically, the transport of tonal frequencies generated by the engines was analyzed.

Item URL in elib:https://elib.dlr.de/196766/
Document Type:Article
Title:High-resolution vibroacoustic characterization of DLR´s Falcon 2000LX ISTAR aircraft
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Winter, ReneUNSPECIFIEDhttps://orcid.org/0000-0003-2115-4001UNSPECIFIED
Sinske, JulianUNSPECIFIEDhttps://orcid.org/0000-0002-6080-9982UNSPECIFIED
Norambuena, MarcoUNSPECIFIEDhttps://orcid.org/0000-0002-0870-4833UNSPECIFIED
Zettel, Sebastian FlorensUNSPECIFIEDhttps://orcid.org/0009-0001-0471-6327141263442
Date:24 August 2023
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Engine Noise, Vibrations, Ground Testing, Structural Intensity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Winter, Rene
Deposited On:28 Aug 2023 10:29
Last Modified:19 Sep 2023 08:52

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